EP3689801B1

EP3689801B1 - Blanked refuse winding apparatus for continuous label paper

Info

Publication number: EP3689801B1
Application number: EP19202744.9A
Authority: EP
Inventors: Kazuhito Takahashi; Toshihiro Saga
Original assignee: Miyakoshi Printing Machinery Co Ltd
Current assignee: Miyakoshi Printing Machinery Co Ltd
Priority date: 2018-12-21
Filing date: 2019-10-11
Publication date: 2022-08-10
Anticipated expiration: 2039-10-11
Also published as: CN111348474A; EP3689801A1; KR102559475B1; CN111348474B; JP2020100483A; AU2019236697A1; KR20200078313A; JP7006938B2

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to a blanked refuse winding apparatus for continuous label paper. Priority is claimed on Japanese Patent Application No. 2018-240357, filed December 21, 2018 .

Description of Related Art

Regarding a blanked refuse winding apparatus for continuous label paper, an apparatus in which, after characters and patterns are printed on continuous label paper, a label base material and an adhesive layer of the continuous label paper are blanked in a prescribed shape, and an unnecessary blanked refuse portion is released from backing paper and is wound around a refuse winding shaft is known. It is conceivable that it may be difficult to secure sufficient strength for blanked refuse blanked in a prescribed shape and that it may break before it reaches a refuse winding shaft. For this reason, it is not preferable that a strong tension be applied to the blanked refuse until the blanked refuse reaches the refuse winding shaft after being released from the backing paper.
Here, the tension applied to the blanked refuse varies depending on a change in a roll diameter of the blanked refuse wound around the refuse winding shaft if a torque on the refuse winding shaft is constant. Further, the tension applied to the blanked refuse varies due to being affected by mechanical loss in a mechanical system or a change in torque of a servomotor due to increase/decrease of a winding speed. For this reason, a change in tension during winding of the blanked refuse may be responsible for breaking of the blanked refuse. Furthermore, the blanked refuse is formed in a prescribed shape in a blanking process. For this reason, the blanked refuse has a property of contraction in a direction perpendicular to a direction of the tension (a width direction of the blanked refuse) when the tension is applied in a carrying direction. Here, in a case of a label having a circular shape or an irregular shape other than a rectangular shape as a prescribed shape is, it may be unlikely for an amount of contraction of the blanked refuse to become constant. For this reason, a load may be concentrated on a portion where the amount of contraction of the blanked refuse is great and thus the blanked refuse may ruffle in the direction perpendicular to the direction of the tension. In this state, when the tension of the blanked refuse varies, the blanked refuse readily breaks.
Especially, in a section (hereinafter referred to as a refuse path) until the blanked refuse reaches the refuse winding shaft after being released from the backing paper, an amount of contraction of the blanked refuse in a width direction may become large, and thus there may be more portions at which the load concentrates. Furthermore, when the amount of contraction of the blanked refuse in the width direction is great, portions where the roll diameter of the wound blanked refuse is great or small occur, and the blanked refuse wound up at a portion where the roll diameter is large gains a high tension. The blanked refuse readily breaks at a portion at which the amount of contraction of the blanked refuse in the width direction is great and the load is concentrated, or at a portion at which a refuse winding diameter is large and which becomes a high tension.
Examples of the blanked refuse winding apparatus for continuous label paper include an apparatus in which an outer circumference of the blanked refuse wound around the refuse winding shaft is brought into contact with a refuse roll driving roller under pressure in order to inhibit the breaking of the blanked refuse. The refuse roll driving roller is synchronously rotated at a carrying speed of the continuous label paper. When the outer circumference of the blanked refuse is brought into contact with a refuse roll driving roller under pressure, the adhesive layer of the blanked refuse adheres to the refuse winding shaft. The refuse winding shaft is rotatively driven in this state, thereby continuously winding the blanked refuse in a roll shape. According to this blanked refuse winding apparatus for continuous label paper, it is possible to significantly shorten the refuse path on which the blanked refuse ruffles in a width direction and in which the above problems are easily caused, to wind the blanked refuse without applying the tension to the blanked refuse, and to inhibit breaking of the blanked refuse (e.g., see FIGS. 2 and 4 of Japanese Unexamined Patent Application, First Publication No. 2000-355459 ).
Meanwhile, in the apparatus disclosed in FIGS. 1 and 3 of Japanese Unexamined Patent Application, First Publication No. 2000-355459 , the blanked refuse portion is released from the continuous label paper to which numerous labels, in each of which the label base material and the adhesive layer are punched in a prescribed shape, adhered, and wound up by the refuse winding shaft. In this case, the refuse winding shaft winds the blanked refuse, and thereby an outer circumferential surface of the refuse roll is formed. In this apparatus, in order to avoid interference of the outer circumferential surface of the refuse roll with a releasing roller, a carrying path of the blanked refuse from the releasing roller to the refuse winding shaft is made longer than or equal to a maximum diameter of the refuse roll.
Meanwhile, in a case where a blanked area of the continuous label paper is large, a shape of the outer circumferential surface of the refuse roll wound around the refuse winding shaft may become deformed. However, in the apparatus disclosed in FIGS. 2 and 4 of Japanese Unexamined Patent Application, First Publication No. 2000-355459 , a deformed refuse roll is rotated when coming into contact with the refuse roll driving roller under pressure, and thus vibration may occur. Generally, blanked refuse having a large blanked area depends on the type of continuous label paper, but has a problem that, since an area of the blanked refuse is small, the blanked refuse after labels for products are blanked from the continuous label paper is maintained in an unstable shape, vibrates, and readily breaks. Furthermore, in a case where occurrence of this vibration is prevented, there is a problem that a refuse winding speed may not be able to be increased.
Here, blanked refuse of a deformed label, that is, a blanked refuse portion of a label which is complicated and relatively large blanked refuse and is supported by thin transverse and longitudinal frames, may be released and wound up by the refuse winding shaft. As with this deformed label, in a case where a blanked shape is complicated or longitudinal frames of the blanked refuse are thin in a winding direction (a carrying direction), or also if the number thereof is reduced, a winding-up force may be transmitted only to a part of the blanked refuse, and there may be a problem that releasing and raising of the blanked refuse may not be able to be smoothly performed by the releasing roller.
Further, like the apparatus disclosed in FIGS. 1 and 3 of Japanese Unexamined Patent Application, First Publication No. 2000-355459 , in a case where the carrying path of the blanked refuse from the releasing roller to the refuse winding shaft is set to be longer than or equal to the maximum diameter of the refuse roll, there may be a problem that a phenomenon in which twisting occurs in transverse frames of the blanked refuse and the blanked refuse is inverted or a phenomenon in which twisting occurs at longitudinal frames of the blanked refuse and the blanked refuse is ruptured easily occurs, especially, in blanked refuse of a deformed label due to vibration or a difference between left and right tensions of the blanked refuse in a carrying process of the blanked refuse.
. Another blanket refuse winding apparatus has been disclosed in the patent application JP 2005 008152 . This winding apparatus has a releasing roller that is configured to carry continuous label paper subjected to a half-blanking process and separated into blanked products and blanked refuse that adhere to backing paper, and this winding apparatus comprises a refuse winding shaft provided away from the releasing roller and configured to wind the blanked refuse into a roll shape.
The present invention has been realized in view of the above circumstances, and has an objective of guiding blanked refuse to be carried, in a process of separating continuous label paper into product labels and blanked refuse and performing raising of the refuse, such that loosening or twisting is prevented from occurring in the blanked refuse. In addition, the present invention aims to achieve the objective of preventing occurrence of twisting, inverting, or breaking of blanked refuse on a carrying path of blanked refuse and adjusting irregularities on an outer circumferential surface of a blanked refuse roll.
Further, the present invention has an objective of eliminating vibration of blanked refuse which is generated from an outer circumferential surface of a blanked refuse roll and winding the blanked refuse with a stable tension.
In addition, the present invention has an objective of allowing releasing and raising of blanked refuse in a releasing roller to be able to be performed smoothly, thereby preventing breaking of the blanked refuse, and improving a winding speed of the refuse.

SUMMARY OF THE INVENTION

To address the above problems, as a first aspect of the present invention, a blanked refuse winding apparatus for continuous label paper is adopted. The blanked refuse winding apparatus for continuous label paper has a releasing roller that is configured to carry continuous label paper subjected to a half-blanking process and separates into blanked products and blanked refuse that adhere to backing paper, and includes:

a refuse winding shaft provided away from the releasing roller and configured to wind the blanked refuse into a roll shape;
a moving mechanism configured to enable the refuse winding shaft to move in a direction away from the releasing roller;
a first detector provided in the course of a carrying path of the continuous label paper and configured to detect a carried amount of the continuous label paper;
a second detector configured to detect one rotation of the refuse winding shaft; and
a calculator configured to obtain a roll diameter of the blanked refuse, which is wound around the refuse winding shaft, from a ratio of a pulse of the first detector to a pulse sent from the second detector whenever the refuse winding shaft rotates once,
wherein the blanked refuse winding apparatus for continuous label paper is configured to perform control of moving the refuse winding shaft in the direction away from the releasing roller on the basis of the roll diameter obtained by the calculator, and includes:
- a refuse pressing roller configured to be able to come into contact with an outer circumferential surface of the blanked refuse wound around the refuse winding shaft in response to a change in the roll diameter; and
- an endless guide belt wound around the releasing roller and the refuse pressing roller and configured to guide the blanked refuse from the releasing roller to a roll of the blanked refuse wound around the refuse winding shaft.

As a second aspect of the present invention, in the first aspect, the refuse pressing roller may be provided to be swingable about an axis of the releasing roller, and may include a refuse pressing carrying unit configured to press the refuse pressing roller toward the outer circumferential surface of the blanked refuse wound around the refuse winding shaft.
As a third aspect of the present invention, in the first aspect or the second aspect, guide grooves may be provided in the releasing roller and the refuse pressing roller, and the guide belts separated in axial directions of the releasing roller and the refuse pressing roller may be wound around the guide grooves.
As a fourth aspect of the present invention, any one of the first aspect to the third aspect may further include a tension regulator provided on a drive side of the refuse winding shaft and configured to adjust a tension applied to the blanked refuse.
As a fifth aspect of the present invention, any one of the first aspect to the fourth aspect may further include a releasing roller positioning unit configured to adjust a position of an axial center of the releasing roller in a direction orthogonal to a direction in which the axial center of the releasing roller and a line of an axial center of the refuse winding shaft are connected.
According to the present invention, when the blanked refuse is wound around the refuse winding shaft in a roll shape, carrying of the blanked refuse from the releasing roller to a roll of the blanked refuse wound around the refuse winding shaft is guided by the guide belts. Thus, a phenomenon in which twisting occurs at transverse frames of the blanked refuse and the blanked refuse is inverted or a phenomenon in which twisting occurs at longitudinal frames of the blanked refuse and the blanked refuse is ruptured easily occurs can be prevented. Simultaneously, refuse raising is smoothly performed, so that breaking of the blanked refuse can be prevented, and a winding speed of the refuse can be improved.
Further, when the blanked refuse wound around the refuse winding shaft in a roll shape is wound, the refuse pressing roller can wind the blanked refuse while pressing the blanked refuse toward the refuse winding shaft with a fixed pressure using the refuse pressing carrying units. Further, a carrying distance of the blanked refuse carried from the releasing roller to the roll of the blanked refuse wound around the refuse winding shaft is set to be constant, so that the blanked refuse can be wound. Thus, the refuse raising can be smoothly performed.
The roll diameter of the blanked refuse wound around the refuse winding shaft in a roll shape increases, and the blanked refuse can be stably guided by the guide belts from the releasing roller to the roll of the blanked refuse wound around the refuse winding shaft while a pressing force for pressing the blanked refuse toward the refuse winding shaft is made constant by the refuse pressing roller in response to this change. Thus, the refuse raising can be smoothly performed.
Furthermore, the refuse winding shaft can be moved in a direction away from the releasing roller on the basis of the roll diameter of the blanked refuse wound around the refuse winding shaft. Accordingly, an interval between an outer circumferential surface of the blanked refuse wound around the refuse winding shaft and an outer circumferential surface of the releasing roller can be controlled to be small. That is, a dimension of a refuse path from the outer circumferential surface of the releasing roller to the outer circumferential surface of the blanked refuse can be controlled to be small. Thus, even in a case where a prescribed shape of each blanked product is a circular shape or an irregular shape other than a rectangular shape, since the tension generated in the blanked refuse that is being wound is stable, breaking of the blanked refuse can be prevented to the maximum extent. Furthermore, the breaking of the blanked refuse is prevented, and thus a speed at which the blanked refuse is wound around the refuse winding shaft can be increased. Thus, a printing speed of the continuous label paper can be increased, and productivity of the blanked products can be remarkably improved.
Further, the tension regulator is provided on a drive side of the refuse winding shaft, and thus a tension applied to the blanked refuse by winding can be adjusted and held constant. Thus, the breaking of the blanked refuse due to a change in tension during the winding can be prevented, and the blanked refuse can be wound in a stable state.
Furthermore, since the refuse pressing roller is made to conform to a change in roll diameter, the refuse pressing roller can be brought into contact with the outer circumferential surface of the blanked refuse. Accordingly, the entire outer circumferential surface of the blanked refuse can be evenly leveled by the refuse pressing roller. Thus, a more suitable interval can be maintained between the outer circumferential surface of the blanked refuse wound around refuse winding shaft and the outer circumferential surface of the releasing roller. Therefore, a tension occurring in the blanked refuse that is being wound can be more favorably stabilized.
Further, a refuse raising position of the releasing roller can be adjusted by providing the releasing roller positioning units. Thus, since a relative position of the releasing roller, that is, a refuse raising position of the releasing roller in a carrying direction of the continuous label paper can be adjusted such that releasing and refuse raising of the blanked refuse are smoothly performed by the releasing roller, the tension occurring in the blanked refuse can be more favorably stabilized. Further, the relative position of the releasing roller, that is, the refuse raising position of the releasing roller in the carrying direction of the continuous label paper can be adjusted. In addition, the speed at which the blanked refuse is wound around the refuse winding shaft by preventing the breaking of the blanked refuse can be increased. Thus, the printing speed of the continuous label paper can be increased, and the productivity of the blanked products can be remarkably improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drive-side front view showing a blanked refuse winding apparatus in an embodiment of the present invention.
FIG. 2 is an operation-side drive-side front view showing the blanked refuse winding apparatus in the embodiment of the present invention.
FIG. 3 is a view showing a releasing roller, a refuse pressing roller, a guide belt, a refuse pressing carrying unit, and a releasing roller positioning units in the embodiment of the present invention, and a schematic front view of an interior viewed in a drive-side direction through an operation-side frame located on a near side.
FIG. 4 is a perspective view showing a state where continuous label paper is separated into labels and blanked refuse in the embodiment of the present invention.
FIG. 5 is a partial sectional top view showing the releasing roller, the refuse pressing roller, the guide belt, the refuse pressing carrying unit, and the releasing roller positioning units in the embodiment of the present invention.
FIG. 6 is a schematic view showing the state where the continuous label paper is separated into labels and blanked refuse in the embodiment of the present invention.
FIG. 7 is a front view showing a winding mechanism of FIG. 1 in the embodiment of the present invention.
FIG. 8 is a side view taken along an arrow VIII of FIG. 1 showing the blanked refuse winding apparatus in the embodiment of the present invention.
FIG. 9 is a side view showing the winding mechanism of FIG. 8 in the embodiment of the present invention.
FIG. 10 is a side view showing a state where a refuse winding shaft of FIG. 8 is lowered downward in the blanked refuse winding apparatus in the embodiment of the present invention.
FIG. 11 is an operation-side front view showing a method for obtaining a roll diameter of a blanked refuse roll of the blanked refuse winding apparatus in the embodiment of the present invention.
FIG. 12 is a front view showing a positional relationship between the refuse winding shaft, the blanked refuse, and the releasing roller of the blanked refuse winding apparatus in the embodiment of the present invention.
FIG. 13 is a graph showing raising timing for the refuse winding shaft of the blanked refuse winding apparatus in the embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, an embodiment of a blanked refuse winding apparatus according to the present invention will be described with reference to the drawings. In the drawings, a reference sign 10 indicates a blanked refuse winding apparatus for continuous label paper.
As shown in FIGS. 1 to 3, the blanked refuse winding apparatus 10 for continuous label paper according to the present embodiment includes a frame 12, a winding mechanism 14, an up-down moving mechanism (a moving mechanism) 16, a detector 20, a calculator 22, a control unit 24, refuse pressing carrying units 200, and releasing roller positioning units 220. The calculator 22 and the control unit 24 are types of computers composed of a memory such as CPU (a central processing unit), ROM (a read only memory), and RAM (a random access memory), a storage device such as SSD (a solid state drive) and HDD (a hard disc drive), and so on. The CPU executes a calculating program or control program, thereby implementing the functions described later. In the following description, the blanked refuse winding apparatus 10 for continuous label paper is abbreviated as "blanked refuse winding apparatus 10."
As shown in FIGS. 2 to 4, continuous label paper 30 is carried as indicated by an arrow A in the blanked refuse winding apparatus 10. In the continuous label paper 30, a label base material is bonded to backing paper 31 via an adhesive layer (not shown). Characters and patterns are printed on the label base material in a printing process in which the continuous label paper 30 is provided on an upstream side of the blanked refuse winding apparatus 10 in a carrying direction or in a separate line device. In a working process after the printing process, a half-blanking process for blanked products 34 (hereinafter referred to as labels) is performed on the label base material and the adhesive layer using an engraving edge or an etching edge (i.e., a flexible die), or a laser beam. In the half-blanking process, the label base material and the adhesive layer of the continuous label paper 30 are processed such that they become bordered in a prescribed shape. That is, the backing paper 31 is not processed in the half-blanking process. The labels 34 and blanked refuse 36 are formed from the label base material in the half-blanking process.
After the half-blanking process of the labels 34 is performed on the continuous label paper 30, the blanked refuse 36 is released from the backing paper 31 of the continuous label paper 30 by a releasing roller 147. Thereby, the continuous label paper 30 is separated into the labels 34 adhering to the backing paper 31 by the adhesive layer and the blanked refuse 36 released from the backing paper 31 by the releasing roller 147. The labels 34 adhering to the backing paper 31 are carried in a direction of an arrow B along with the backing paper 31.
On the other hand, the blanked refuse 36 released from the backing paper 31 is wrapped around approximately half of an outer circumferential surface 147a of the releasing roller 147. Afterward, the blanked refuse 36 is spread, guided, and supported on a carrying guide conveyor that is formed by a plurality of guide belts (round belts) 145 wound around the releasing roller 147 on a carrying path until it reaches a refuse winding shaft 51 at a position above the releasing roller 147 in a state where the guide belts are spaced apart in a width direction of the blanked refuse 36 which is an axial direction of the releasing roller 147 as will be described below. The blanked refuse 36 is guided by the carrying path in this way, and is carried up to the refuse winding shaft 51 while preventing occurrence of loosening or twisting.
The carried blanked refuse 36 sticks to a paper tube 64 of the refuse winding shaft 51, and is wound in a roll shape by rotation of the refuse winding shaft 51. Hereinafter, the blanked refuse 36 wound around the refuse winding shaft 51 in a roll shape is referred to as "blanked refuse roll 37."
Hereinafter, a constitution of the blanked refuse winding apparatus 10 will be described on the basis of FIGS. 1 to 10. As shown in FIGS. 1 to 3 and 8, the winding mechanism 14, the up-down moving mechanism 16, the refuse pressing carrying units 200, and the detector 20 are supported on the frame 12 of the blanked refuse winding apparatus 10. Further, a carrying roller 41, a nip roller 42, a guide roller 43, a turnabout roller 44, a label transferring roller 45, a re-pressed roller 46, and a re-pressing roller 47 are rotatably supported on the frame 12. The carrying roller 41 carries the continuous label paper 30 along with the nip roller 42 with the continuous label paper 30 sandwiched therebetween. The re-pressed roller 46 carries the continuous label paper 30 along with the re-pressing roller 47 with the continuous label paper 30 sandwiched therebetween.
The carrying roller 41, the nip roller 42, the guide roller 43, the turnabout roller 44, the label transferring roller 45, the re-pressed roller 46, and the re-pressing roller 47 are provided in this order, for example, from an upstream side of the carrying path of the continuous label paper 30, and forms the carrying path of the continuous label paper 30. In FIGS. 1 and 2, the carrying path of the continuous label paper 30 is partly omitted. Further, as will be described below, the releasing roller 147 is rotatably supported on the frame 12. In the figures, for illustration, the frame 12 or the like may be partly omitted.
As shown in FIG. 3, a label transferring blade 144 is provided at a position that becomes a lowermost end of the outer circumferential surface 147a of the releasing roller 147. When the continuous label paper 30 is carried into a gap between the label transferring blade 144 and the releasing roller 147, the label transferring blade 144 changes a direction of the backing paper 31 (turns the backing paper 31 back) to release the labels 34 adhering to the backing paper 31 from the backing paper 31 in the continuous label paper 30 from which the blanked refuse 36 is separated, and simultaneously separates the backing paper 31 toward the turnabout roller 44.
The label transferring roller 45 is provided at a position close to a tip of the label transferring blade 144. The label transferring roller 45 is disposed at a position where the label 34 released at a position of the tip of the label transferring blade 144 can adhere to the backing paper 31 again. The re-pressed roller 46 and the re-pressing roller 47 are disposed on a downstream side of the label transferring roller 45.
The releasing roller 147 is located such that a bottom 147g serving as the lowermost end of the outer circumferential surface 147a thereof maintains a prescribed gap without biasing the continuous label paper 30 toward the label transferring blade 144. As will be described below, the releasing roller 147 is supported on the frame 12 by the releasing roller positioning units 220 to be movable horizontally. The releasing roller 147, the label transferring blade 144, the turnabout roller 44, and the label transferring roller 45 constitute a label transferring mechanism.
Furthermore, as shown in FIGS. 1 and 8, a clearance hole 48 is formed in the frame 12. The clearance hole 48 extends in an up-down direction such that the refuse winding shaft 51 is movable in the up-down direction.
The winding mechanism 14 includes the refuse winding shaft 51, a powder clutch (a tension regulator) 53, and a first servomotor 55. The refuse winding shaft 51, the powder clutch 53, and the first servomotor 55 are mounted on a movable body 76 of the up-down moving mechanism 16. The refuse winding shaft 51 is rotatably supported on an upper portion 85a of a first table 85 of the movable body 76 via a bearing. The refuse winding shaft 51 is provided above a roller center 147b of the releasing roller 147 in an approximately vertical direction (see FIG. 2).
Further, the refuse winding shaft 51 is formed in a hollow shape having a circular cross section, and a plurality of elongate holes (slits) 57 extending in an axial direction are formed in an outer circumference thereof. A first timing pulley 58 is coaxially mounted on the refuse winding shaft 51. A rubber tube is stored inside the refuse winding shaft 51 in an elastically deformable way. Metal claws 62 (hereinafter referred to as lugs) are fitted into an outer circumference of the rubber tube. An air flow passage communicates with an interior of the rubber tube. The air flow passage communicates with an air supply source via a rotary joint 63.
The interior of the rubber tube is filled with air supplied from the air supply source through the rotary joint 63 and the air flow passage. Accordingly, the rubber tube is expanded outward in a radial direction, so that the lugs 62 protrude outward from the elongate holes 57 of the refuse winding shaft 51 in the radial direction. Here, the paper tube 64 (see FIG. 2) is fitted around the refuse winding shaft 51. Therefore, the lugs 62 protruding from the elongate holes 57 of the refuse winding shaft 51 come into contact with an inner surface of the paper tube 64, and the paper tube 64 is coaxially fixed to the refuse winding shaft 51. In the embodiment, although the example in which the lugs 62 are made to protrude outward in the radial direction using air pressure has been described, the embodiment is not limited thereto. As another example, the lugs 62 may, for example, be made to mechanically protrude outward in the radial direction. An anti-rotation bracket 65 is mounted on a case of the rotary joint 63. The anti-rotation bracket 65 is mounted on a second table 86 of the movable body 76. Accordingly, corotation of the case of the rotary joint 63 is prevented by the anti-rotation bracket 65.
As shown in FIGS. 7 to 9, the first servomotor 55 is coupled to the refuse winding shaft 51 via the powder clutch 53. The first servomotor 55 is mounted on a plate 83 under the second table 86. The plate 83 is mounted on a lower portion of the second table 86. To be specific, a plurality of first elongate holes 86a are formed in the lower portion of the second table 86 to extend in the up-down direction. The plate 83 is mounted on the lower portion of the second table 86 by first bolts 81 that pass through the plurality of first elongate holes 86a. The first servomotor 55 is mounted on the lower portion of the second table 86 of the movable body 76 via the plate 83. Accordingly, the plate 83 is moved in the up-down direction by loosening the first bolts 81, thereby enabling the first servomotor 55 to move in the up-down direction. That is, the first servomotor 55 can be positioned with respect to the powder clutch 53 in the up-down direction. A second timing pulley 66 is coaxially mounted on an output shaft of the first servomotor 55.
In the second table 86, the powder clutch 53 is disposed between the first servomotor 55 and the refuse winding shaft 51. Here, a plurality of second elongate holes 86b are formed in an upper portion of the second table 86 to extend in the up-down direction. Second bolts 97 are configured to pass through the plurality of second elongate holes 86b and to be screwed to a pair of coupling members 87. The second bolts 97 are tightened, and thereby are configured to be able to fix the second table 86. Accordingly, the second table 86 is moved in the up-down direction by loosening the second bolts 97, thereby enabling the powder clutch 53 to move in the up-down direction. That is, the powder clutch 53 can be positioned with respect to the refuse winding shaft 51 in the up-down direction. The powder clutch 53 is provided on a drive side of the refuse winding shaft 51, and is generally adopted, for example, for production or the like of long objects. Since the powder clutch 53 uses a powder (a magnetic iron powder) for transmission of a torque, it has both the smoothness of a fluid clutch and the high-efficiency engagement of a friction plate type clutch.
That is, a change in a tension applied to the blanked refuse 36 can be constantly held by smoothly sliding the powder clutch 53. Further, a set torque of the powder clutch 53 can be changed step by step depending on the roll diameter D (see FIG. 2) of the blanked refuse roll 37. Accordingly, since the powder clutch 53 is provided on the drive side of the refuse winding shaft 51, the tension applied to the blanked refuse 36 of the blanked refuse roll 37 is adjusted, and thereby the change of the tension can be constantly held. Thereby, it is possible to prevent the blanked refuse 36 from being cut by the change in the tension applied to the blanked refuse 36.
As shown in FIGS. 2 to 4, in the present embodiment, a rotational speed of the refuse winding shaft 51 is set to such a fixed value that, when the roll diameter D of the blanked refuse roll 37 is a diameter of the minimum paper tube 64, a wound amount of the blanked refuse 36 is equal to or more than at least a carried amount of the continuous label paper 30 on the carrying path. Accordingly, the blanked refuse 36 is wound around the refuse winding shaft 51 without slackening. On the other hand, when the roll diameter D of the blanked refuse roll 37 is increased, the wound amount of the blanked refuse 36 of the refuse winding shaft 51 increases with respect to the carried amount of the continuous label paper 30 on the carrying path. In this case, since the tension applied to the blanked refuse 36 increases, the set torque of the powder clutch 53 (see FIG. 9) is configured to be able to be adjusted step by step.
As shown in FIGS. 2, 8 and 9, a tension is applied to the blanked refuse 36 of the blanked refuse roll 37. The tension varies due to being affected by a change in the roll diameter D of the blanked refuse roll 37, a mechanical loss of a mechanical system, or a change in torque of the first servomotor 55 during acceleration/deceleration. Accordingly, the powder clutch 53 is interposed between the refuse winding shaft 51 and the first servomotor 55, so that a change in the tension applied to the blanked refuse 36 can be constantly held.
Further, the powder clutch 53 also has a structure in which the set torque thereof can vary step by step depending on the roll diameter D of the blanked refuse roll 37 in order to conform to the change of the roll diameter D of the blanked refuse roll 37. That is, if the torque on the refuse winding shaft 51 is constant, the tension applied to the blanked refuse 36 varies depending on the change of the roll diameter D of the blanked refuse roll 37. Accordingly, since the set torque of the powder clutch 53 is caused to vary step by step depending on the roll diameter D of the blanked refuse roll 37, a change in tension can be constantly held.
In this way, since the powder clutch 53 is provided on the drive side of the refuse winding shaft 51, the tension applied to the blanked refuse 36 by winding can be constantly held. Thus, it is possible to prevent the blanked refuse 36 from being cut by a change in tension during winding and wind the blanked refuse 36 in a stable state. The set torque of the powder clutch 53 can be changed on a screen of a monitor installed on the blanked refuse winding apparatus 10.
The powder clutch 53 is mounted on the upper portion of the second table 86 of the movable body 76. A third timing pulley 68 is coaxially mounted on an input shaft of the powder clutch 53. Further, a fourth timing pulley 69 is coaxially mounted on an output shaft of the powder clutch 53. The third timing pulley 68 is coupled to the fourth timing pulley 69 via the input and output shafts of the powder clutch 53.
The second timing pulley 66 of the first servomotor 55 is coupled to the third timing pulley 68 of the powder clutch 53 via a first timing belt 71. A tension of the first timing belt 71 is suitably adjusted by loosening the plurality of first bolts 81 (see FIG. 7) to move the first servomotor 55 in the up-down direction. Further, the fourth timing pulley 69 of the powder clutch 53 is coupled to the first timing pulley 58 of the refuse winding shaft 51 via a second timing belt 72. A tension of the second timing belt 72 is suitably adjusted by loosening the plurality of second bolts 97 (see FIG. 7) to move the powder clutch 53 in the up-down direction.
Since the second timing pulley 66 is rotated by the first servomotor 55 in this state, the rotation of the second timing pulley is transmitted to the third timing pulley 68 of the powder clutch 53 via the first timing belt 71. The third timing pulley 68 is rotated, and thereby the input shaft of the powder clutch 53 is rotated. The input shaft of the powder clutch 53 is rotated, and thereby the output shaft of the powder clutch 53 is rotated. The output shaft of the powder clutch 53 is rotated, and thereby the fourth timing pulley 69 is rotated. The rotation of the fourth timing pulley 69 is transmitted to the first timing pulley 58 via the second timing belt 72. The first timing pulley 58 is rotated, and thereby the refuse winding shaft 51 is rotated in a winding direction of the blanked refuse 36. Thereby, the blanked refuse 36 is wound around the paper tube 64 of the refuse winding shaft 51.
Here, the fourth timing pulley 69 and the first timing pulley 58 are formed to have the same number of teeth. Accordingly, the rotational speed of the refuse winding shaft 51 is the same as that of the output shaft of the powder clutch 53. Further, the second timing pulley 66 of the output shaft of the first servomotor 55 and the third timing pulley 68 of the input shaft of the powder clutch 53 are formed with the same number of teeth as the fourth timing pulley 69 of the output shaft of the powder clutch 53.
In this way, the powder clutch 53 is interposed between the refuse winding shaft 51 and the first servomotor 55, and thereby the change of the tension applied to the blanked refuse 36 can be constantly held by the powder clutch 53. Further, in a case where the torque on the refuse winding shaft 51 is constantly held, the tension applied to the blanked refuse 36 varies depending on the change of the roll diameter D of the blanked refuse roll 37. To conform to the change of the roll diameter D, the set torque of the powder clutch 53 can be caused to vary step by step depending on the roll diameter D of the blanked refuse roll 37. Thus, it is possible to prevent the blanked refuse 36 from being cut by the change of the tension applied to the blanked refuse 36.
The coupling of the first servomotor 55, the powder clutch 53, and the refuse winding shaft 51 is not limited to the constitution of the embodiment. The refuse winding shaft 51 and the first servomotor 55 may be coupled through the powder clutch 53. The winding mechanism 14 is mounted on the movable body 76 of the up-down moving mechanism 16.
As shown in FIGS. 1 and 8, the up-down moving mechanism 16 includes a pair of linear motion guides 75, the movable body 76, a pair of ball screws 77, a pair of driven gears 78, a pair of driving gears 79, and a second servomotor 82. The pair of linear motion guides 75 are mounted on both sides of the clearance hole 48 in the frame 12. The pair of linear motion guides 75 extend along the clearance hole 48 in the up-down direction. The movable body 76 is supported on the pair of linear motion guides 75 to be movable in the up-down direction.
The movable body 76 includes a plurality of sliders 84, the first table 85, and the second table 86. The plurality of sliders 84 are movably supported on the pair of linear motion guides 75. To be specific, the plurality of sliders 84 are for example constructed such that two sliders 84 are movably supported on one of the linear motion guides 75 with a gap in the up-down direction and two sliders 84 are movably supported on the other of the linear motion guides 75 with a gap in the up-down direction. The plurality of sliders 84 are mounted on the first table 85. The second table 86 is mounted on the first table 85 through the coupling members 87.
That is, the plurality of sliders 84, the first table 85, the coupling members 87, and the second table 86 are integrally mounted. Accordingly, the plurality of sliders 84, the first table 85, the coupling members 87, and the second table 86 are supported on the pair of linear motion guides 75 to be movable in the up-down direction. The winding mechanism 14 is mounted on the first table 85 and the second table 86. That is, the winding mechanism 14 is supported on the pair of linear motion guides 75 through the movable body 76 to be movable in the up-down direction. The pair of ball screws 77 are provided on both sides of the movable body 76.
The pair of ball screws 77 are rotatably mounted on both sides of the movable body 76 and at positions away from the clearance hole 48 relative to the pair of linear motion guides 75 through upper and lower bearings 88 in the frame 12. The pair of ball screws 77 extend along the clearance hole 48 in the up-down direction. Nuts (not shown) are rotatably supported on the pair of ball screws 77, and are supported on coupling brackets 92. The coupling brackets 92 are mounted on the coupling members 87 (also see FIG. 7). The pair of driven gears 78 are mounted on lower ends of the pair of ball screws 77. To be specific, one of the pair of driven gears 78 is coaxially mounted on one of the pair of ball screws 77. Further, the other of the pair of driven gears 78 is coaxially mounted on the other of the pair of ball screws 77. The pair of driven gears 78 are bevel gears.
The pair of driving gears 79 are engaged with the pair of driven gears 78. That is, one of the pair of driving gears 79 is engaged with one of the pair of driven gears 78. Further, the other of the pair of driving gears 79 is engaged with the other of the pair of driven gears 78. The pair of driving gears 79 are bevel gears, and are coaxially mounted adjacent to opposite ends of the rotary shaft 89. The opposite ends of the rotary shaft 89 are rotatably supported on the frame 12 through bearings 91. A fifth timing pulley 93 is coaxially mounted on the middle of the rotary shaft 89. The second servomotor 82 is mounted below the rotary shaft 89.
The second servomotor 82 is mounted on the frame 12 through a mounting bracket 94. A sixth timing pulley 95 is coaxially mounted on an output shaft of the second servomotor 82. The sixth timing pulley 95 of the second servomotor 82 is coupled to the fifth timing pulley 93 of the rotary shaft 89 through the third timing belt 96. A tension of the third timing belt 96 is suitably adjusted by moving the second servomotor 82 in the up-down direction.
In this state, the sixth timing pulley 95 is rotated by the second servomotor 82, and thereby the rotation of the sixth timing pulley 95 is transmitted to the fifth timing pulley 93 of the rotary shaft 89 through the third timing belt 96. The fifth timing pulley 93 is rotated, and thereby the pair of driving gears 79 are rotated through the rotary shaft 89. The pair of driving gears 79 are rotated, and thereby the pair of driven gears 78 are rotated. The pair of driven gears 78 are rotated, and thereby the pair of ball screws 77 are rotated. The pair of ball screws 77 are rotated, and thereby the coupling brackets 92 (i.e., the movable body 76) are moved in the up-down direction. The winding mechanism 14 is mounted on the first and second tables 85 and 86 of the movable body 76. The movable body 76 is moved in the up-down direction, and thereby the refuse winding shaft 51 of the winding mechanism 14 is moved in the up-down direction.
As shown in FIGS. 8 and 10, since the refuse winding shaft 51 is moved in the up-down direction (a direction of an arrow C) by the up-down moving mechanism 16, the refuse winding shaft 51 can be moved in the up-down direction in response to the change of the roll diameter D of the blanked refuse roll 37. That is, the refuse winding shaft 51 can be moved by the up-down moving mechanism 16 in a direction away from the releasing roller 147 or in a direction toward the releasing roller 147.
Thus, an outer circumferential surface 36a of the blanked refuse roll 37 does not come into contact with the outer circumferential surface 147a of the releasing roller 147, and the refuse winding shaft 51 can be adjusted to a prescribed interval (distance) r (see FIGS. 12 and 13) which will be described below.
As shown in FIGS. 2 to 5, the refuse pressing carrying units 200 are provided above the releasing roller 147 at lateral positions of the releasing roller 147 and the refuse winding shaft 51. In FIG. 2, a support 12a and the frame 12 that are located on an outer side (a near side) of the releasing roller 147 or the like are not partly shown.
Each of the refuse pressing carrying units 200 includes a refuse pressing roller 142, the guide belts 145, a swing part 150, and a refuse pressing air cylinder 153. The refuse pressing roller 142 is rotatably mounted on the swing part 150 that can be swung about the roller center 147b of the releasing roller 147. One end of the swing part 150 can be coaxially swung about the roller center 147b of the releasing roller 147. The refuse pressing roller 142 having an axis parallel with an axis of the releasing roller 147 is rotatably mounted on the other end of the swing part 150.
As the swing part 150 can be swung about the roller center 147b of the releasing roller 147, the refuse pressing roller 142 can, as indicated in FIG. 3 by an arrow S, be swung about the roller center 147b of the releasing roller 147 along a prescribed circular arc defined by a length dimension of the swing part 150. The length dimension of the swing part 150 is made to conform to the change of the roll diameter D of the blanked refuse roll 37, so that the refuse pressing roller 142 is disposed to be able to come into contact with the outer circumferential surface 36a of the blanked refuse roll 37 at all times.
The releasing roller 147 and the refuse pressing roller 142 have diameter dimensions that are approximately equal to each other. The axis of the refuse pressing roller 142 is horizontally located on an upstream side of the continuous label paper 30 in a carrying direction with respect to a vertical plane defined by connecting the axis of the releasing roller 147 and an axis of the refuse winding shaft 51. Simultaneously, the axis of the refuse pressing roller 142 is located close to the axis of the refuse winding shaft 51 in the vertical direction with respect to the axis of the releasing roller 147.
One end 153a of the refuse pressing air cylinder 153 is pivotably (swingably) mounted on the other end of the swing part 150. The other end 153b of the refuse pressing air cylinder 153 is pivotably fixed below the axis of the releasing roller 147 in the up-down direction and at a position that is more distant from the axis of the releasing roller 147 than the one end 153a of the refuse pressing air cylinder 153 in the horizontal direction.
The refuse pressing air cylinder 153 is connected to an air regulator (not shown), and can press the vicinity of the other end of the swing part 150 with a fixed pressing force by controlling supply of air for drive. The refuse pressing air cylinder 153 supplies air to be expanded by the air regulator, and thereby can press the refuse pressing air cylinder 153 toward the refuse winding shaft 51 in response to a swing of the swing part 150. Thus, the refuse pressing air cylinder 153 causes the refuse pressing roller 142 to swing about the roller center 147b in a direction in which it comes into contact with the blanked refuse roll 37, and simultaneously can adjust a contact pressure between the refuse pressing roller 142 and the blanked refuse roll 37 in this case. Application of a pressurizing force to the refuse pressing roller 142 that heads for the blanked refuse roll 37 is not limited to the air cylinder, and may be a pressure spring, an electric cylinder, or the like.
The refuse pressing air cylinder 153, the swing part 150, the refuse pressing roller 142, and the guide belts 145 constitute each of the refuse pressing carrying units 200. The refuse pressing roller 142 is pressed by the refuse pressing air cylinder 153, always comes into contact with the outer circumferential surface 36a of the blanked refuse roll 37 at a constant pressure even in a case where the roll diameter D of the blanked refuse roll 37 is changed (increased), and is made to rotate at the same speed as a winding speed of the blanked refuse roll 37.
Guide grooves 147f and 142f are provided in both the outer circumferential surface 147a of the releasing roller 147 and an outer circumferential surface 142a of the refuse pressing roller 142 in a circumferential direction. The guide grooves 147f and 142f are provided in the same number at positions at which they are coincident with each other in the axial directions of the releasing roller 147 and the refuse pressing roller 142. The guide grooves 147f and 142f are U-shaped grooves or V-shaped grooves, and are provided in at least two places in the axial directions of the releasing roller 147 and the refuse pressing roller 142.
An endless guide belt (round belt) 145 is wrapped around the guide grooves 147f and 142f, and the guide grooves 147f and 142f determine position of the guide belt (the round belt) 145 in a belt width direction. Depths of the guide grooves 147f and 142f are set to be equal to or slight larger than cross-sectional outer diameters of the guide belt (the round belt) 145, and are set to depths at which the outer circumferential surfaces 147a and 142a of the guide belt (the round belt) 145 do not protrude outward from the guide grooves 147f and 142f.
The plurality of guide belts (round belts) 145 wrapped around the outer circumferential surface 147a of the releasing roller 147 and the outer circumferential surface 142a of the refuse pressing roller 142 are parallel to each other, and are moved in a direction that is approximately coincident with the carrying direction of the blanked refuse 36. The plurality of guide belts (round belts) 145 are disposed in a width direction of the blanked refuse 36 that is the axial direction of the releasing roller 147, and all define a plane parallel with the carrying direction of the blanked refuse 36. At least two guide belts (round belts) 145 may be provided in the width direction of the blanked refuse 36 that is the axial direction of the releasing roller 147, and a plurality of guide belts (round belts) 145 are preferably provided at approximately regular intervals in the width direction of the blanked refuse 36 in order to stably carry the blanked refuse 36.
Thus, the blanked refuse 36 to be carried is guided in uniform contact with the outer circumferential surface 147a of the releasing roller 147 and the outer circumferential surface 142a of the refuse pressing roller 142. For example, Bancord or the like available from Bando Chemical Industries, LTD can be applied as the guide belts (the round belts) 145. The guide belts 145 are not limited to the round belts, and flat belts or V belts. In this case, the guide grooves 147f and 142f are also preferably formed in a cross-sectional shape corresponding to the adopted guide belts. Further, it will do if the guide belts 145 can guide the blanked refuse 36 while preventing deformation of the blanked refuse 36 itself with respect to the entire width of the blanked refuse 36, and disposition of the guide belts 145 is not limited to the shown example of the present embodiment. Further, the guide belts 145 are not limited in width dimension (cross-sectional dimension) and number thereof if they are separated in the axial directions of the releasing roller 147 and the refuse pressing roller 142.
Furthermore, the guide belts (the round belts) 145 are wrapped between the releasing roller 147 and the refuse pressing roller 142, and are rotated between the refuse pressing roller 142 and the releasing roller 147 by contact with the refuse pressing roller 142. Simultaneously, since the guide belts (the round belts) 145 are wrapped between the releasing roller 147 and the refuse pressing roller 142, they can rotate the releasing roller 147 and the refuse pressing roller 142 at the same speed. Thus, the guide belts 145 are in contact with the outer circumferential surface 36a of the blanked refuse roll 37, and can rotate the releasing roller 147 at the same speed as the refuse pressing roller 142 rotated at a rotational speed corresponding to the winding speed of the blanked refuse roll 37.
Therefore, the winding speed of the blanked refuse roll 37 and a refuse raising speed in the releasing roller 147 can be synchronized with each other. Since the guide belts (the round belts) 145 are wound around the refuse pressing roller 142 in the vicinity that comes into contact with the outer circumferential surface 36a of the blanked refuse roll 37, the blanked refuse 36, which is guided by the plurality of round belts and is carried from the releasing roller 147 to the refuse pressing roller 142, prevents the outer circumferential surface 36a of the blanked refuse roll 37 from becoming an uneven shape, and is wound around the refuse winding shaft 51.
In the above constitution, rotary drive sources such as motors are not connected to the releasing roller 147 and the refuse pressing roller 142. The refuse pressing roller 142 is rotated by coming into contact with the outer circumferential surface 36a of the blanked refuse roll 37 that is rotatively driven. The releasing roller 147 is rotatively driven by the guide belts (the round belts) 145 wound around the refuse pressing roller 142 to be rotated. The releasing roller 147 and the refuse pressing roller 142 may be configured to be driven by connecting rotary drive sources such as motors thereto.
The blanked refuse 36 released from the backing paper 31 is wrapped around approximately half of the outer circumferential surface 147a of the releasing roller 147. Afterward, the blanked refuse 36 is guided to maintain a shape of the blanked refuse 36 by the carrying guide conveyor formed by the plurality of guide belts (round belts) 145 on the carrying path until it reaches the refuse winding shaft 51 at a position above the releasing roller 147. The blanked refuse 36 is guided by the carrying path, and is carried up to the refuse winding shaft 51 while preventing occurrence of loosening or twisting.
The refuse pressing roller 142 provided at a position that is downstream in the carrying guide conveyor can be swiveled around the roller center 147b that is a supporting axis of the releasing roller 147. The refuse pressing roller 142 is always rotated in contact with the outer circumferential surface 36a of the blanked refuse roll 37 under constant pressure by a pressuring force of the refuse pressing air cylinder 153, and has a function of leveling irregularities on the outer circumferential surface 36a of the blanked refuse roll 37 on average and a function of adjusting a shape. Thus, since a change in tension caused by the irregularities on the outer circumferential surface 36a of the blanked refuse roll 37 is reduced, and vibration caused by eccentric rotation of the blanked refuse roll 37 is also reduced, the blanked refuse 36 can be wound without being cut.
Since the pressuring force of the refuse pressing air cylinder 153 can be adjusted by setting a pressure of the air regulator, it can increase/decrease in response to the irregularities on the outer circumferential surface 36a of the blanked refuse roll 37.
The refuse pressing roller 142 can adjust air pressure caused by the refuse pressing air cylinder 153 using a regulator provided on an air pipe path. For example, by adjusting the air pressure of the regulator to 0.05 to 0.3 MPa, a contact pressure of the refuse pressing roller 142 is configured to be arbitrarily variable depending on conditions such as a type, a blanked area, etc. of the continuous label paper 30 (see FIG. 4).
That is, the refuse pressing roller 142 is adjusted to come into contact with the outer circumferential surface 36a of the blanked refuse roll 37 at such a pressure at which no vibration occurs. Such a pressure at which no vibration occurs is applied to the outer circumferential surface 36a of the blanked refuse roll 37, so that winding collapse of the blanked refuse 36 that is being wound around the refuse winding shaft 51 or excessive entrainment of air between layers of the wound blanked refuse 36 can be prevented. That is, a roll shape of the blanked refuse roll 37 can be suitably corrected by the refuse pressing roller 142.
Since the roll shape of the blanked refuse roll 37 is corrected (rectified) by the refuse pressing roller 142, the irregularities on the outer circumferential surface 36a of the blanked refuse roll 37 can be made even to a certain extent. Thus, a change in tension caused by the irregularities on the outer circumferential surface 36a of the blanked refuse roll 37 can be suppressed to a certain extent.
In this way, the refuse pressing roller 142 can be brought into contact with the outer circumferential surface 36a of the blanked refuse roll 37 by making the refuse pressing roller 142 conform to the change of the roll diameter D of the blanked refuse roll 37. Accordingly, the entire outer circumferential surface 36a of the blanked refuse roll 37 can be evenly leveled by the refuse pressing roller 142. Thus, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 can be suitably maintained with no contact between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 in a state where the refuse pressing roller 142 are in contact with the outer circumferential surface 36a of the blanked refuse roll 37. Therefore, a tension occurring in the blanked refuse 36 that is being wound around refuse winding shaft 51 can be favorably stabilized.
A position of the roller center 147b of the releasing roller 147 can be set with respect to an axial center of the refuse winding shaft 51 by the releasing roller positioning units 220 in a direction orthogonal to a direction connecting an axial center of the releasing roller 147 and the axial center of the refuse winding shaft 51, that is, in a horizontal direction.
The releasing roller positioning units 220 are provided at positions of opposite ends of the releasing roller 147 in a pair, and can independently set a horizontal position of the releasing roller 147.
As shown in FIGS. 3, 4 and 5, each of the releasing roller positioning units 220 has a support recess 221 that is provided in the frame 12 and supports the end of the releasing roller 147, a screw 222 that is located inside the support recess 221 and extends parallel with the support recess 221, and an adjusting handle 224 that is connected to the screw 222 via an arm shaft 223. In FIG. 4, illustration of the releasing roller positioning units 220 is partly omitted.
The support recess 221 is provided in the support 12a that is provided close to the releasing roller 147 in a body with the frame 12. The support recess 221 has a rectilinear upper surface 221a that extends on a straight line in an approximately horizontal direction and becomes an approximately flat surface, and a rectilinear lower surface 221b that is parallel with the rectilinear upper surface 221a. An end of a releasing roller support shaft 147k that supports the releasing roller 147 to be rotatable about the roller center 147b via a ball bearing 147m is located in the support recess 221. The releasing roller support shaft 147k is supported in the support recess 221 to be slidable relative to the support 12a and the frame 12 in the horizontal direction. In the vicinity of the end of the releasing roller support shaft 147k, portions that become upper and lower positions thereof are flattened, so that flattened surfaces 147n are formed. Both of the flattened surfaces 147n are in contact with the rectilinear upper and lower surfaces 221a and 221b of the support recess 221. The screw 222 is screwed into the end of the releasing roller support shaft 147k to extend in the horizontal direction orthogonal to the axis of the releasing roller 147 and to pass through the end of the releasing roller support shaft 147k. The screw 222 is rotated, and thereby the end of the releasing roller support shaft 147k can be moved along the support recess 221 in a direction in which the screw 222 extends.
A position regulation part 227 is provided at one end of the arm shaft 223. After the position regulation part 227 regulates a horizontal position of the screw 222, the screw 222 is formed in a coaxial state. The adjusting handle 224 is connected to the other end of the arm shaft 223. When the adjusting handle 224 is rotated, the screw 222 is rotated via the arm shaft 223, and the end of the releasing roller support shaft 147k can be moved in the horizontal direction orthogonal to the axis of the releasing roller 147 in accordance with the rotation of the screw 222. A movement amount indicator 226 is provided at the other end of the arm shaft 223. The movement amount indicator 226 detects a rotational speed of the arm shaft 223, and can indicate a movement amount of the end of the releasing roller support shaft 147k, that is, a movement amount of the roller center 147b of the releasing roller 147.
As shown in FIGS. 3 to 6, each of the releasing roller positioning units 220 is configured to be able to adjust a relative position between the releasing roller 147 and the label transferring blade 144, which are provided adjacent to each other in a flow direction, by the adjusting handle 224. By rotating the adjusting handle 224 of each of the releasing roller positioning units 220, the releasing roller 147 can be horizontally moved like a right position indicated in FIG. 6 by a solid line and a left position indicated in FIG. 6 by a broken line. In this case, the releasing roller 147 can be horizontally moved while holding a prescribed gap in which a bottom surface 147g becoming the lowermost end of the outer circumferential surface 147a does not bias the continuous label paper 30 toward the label transferring blade 144.
Here, when the releasing roller is located at the left position indicated in FIG. 6 by the broken line, the blanked refuse 36 of the continuous label paper 30 is released from the backing paper (the release sheet) 31, and the label 34 heads for the label transferring roller 45 in a state where it still sticks to the backing paper (the release sheet) 31. However, when the releasing and the refuse raising of the blanked refuse 36 are not smoothly performed by the releasing roller 147 due to the blanked refuse 36 of a deformed label, that is, the blanked refuse 36 that is complicated and relatively large, the adjusting handle 224 is turned to advance the releasing roller 147 to the right position indicated in FIG. 6 by the solid line.
The blanked refuse 36 and the label 34 of the continuous label paper 30 are separated from the backing paper (the release sheet) 31 by the label transferring blade 144 at the right position indicated in FIG. 6 by the solid line, and then head for the releasing roller 147. For this reason, at the right position indicated in FIG. 6 by the solid line, the blanked refuse is more smoothly wound up than at the left position which is indicated in FIG. 6 by the broken line and at which the blanked refuse 36 is wound up while being released from the backing paper (the release sheet) 31.
In this case, the label 34 leaving the releasing roller 147 adheres again to the backing paper (the release sheet) 31 that is wrapped and carried from the label transferring blade 144 through the turnabout roller 44 to the label transferring roller 45 in a state where a vertical position is shifted, and is carried to a downstream side. Further, since the blanked refuse 36 is endlessly connected, it is directed toward the releasing roller 147 by a winding-up force from the upper guide belts (round belts) 145, the refuse pressing roller 142, and the refuse winding shaft 51, and is pulled upward by an upward tension indicated in FIG. 6 by an arrow F1 at the releasing roller 147.
In contrast, a force that causes the backing paper (the release sheet) 31 to flow downward at the tip of the label transferring blade 144 acts on the label 34 as indicated in FIG. 6 by an arrow F2, and the label 34 moves in a direction of the label transferring roller 45, and is not thus wound up along with the blanked refuse 36.
Since the relative position, between the releasing roller 147 and the label transferring blade 144, in order for the releasing and the refuse raising of the blanked refuse 36 being smoothly performed by the releasing roller 147 is changed by the shape of the blanked refuse 36, the relative position is adjusted by the adjusting handle 224 in each case. Further, when the releasing roller 147 moves in a front-rear direction, the setting of the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147, which was previously mentioned with reference to the swing part 150 also varies as needed.
As shown in FIGS. 7 and 9, the detector 20 includes a first sensor 116, a second sensor 117, a third sensor (a second detector) 118, a line encoder (a first detector) 119 (see FIGS. 3 and 11). The first sensor 116 is mounted on an upper portion 12b of the frame 12 via a first mounting bracket 127. The first sensor 116 detects a detection piece 128. The detection piece 128 is mounted on an end 85c of a lateral surface 85b of the first table 85. The first sensor 116 detects the detection piece 128, thereby determining an upper limit of the first table 85 (i.e., the movable body 76) that is moved in the up-down direction. The second sensor 117 is mounted on a portion 12c that is closer to a lower portion than the upper portion 12b of the frame 12 via a second mounting bracket 129. The second sensor 117 detects the detection piece 128. The second sensor 117 detects the detection piece 128, thereby determining a lower limit of the first table 85 (i.e., the movable body 76) that is moved in the up-down direction.
Here, the mounting positions or the detecting positions of the first and second sensors 116 and 117, and the number of first and second sensors 116 and 117 are not limited to the embodiment. For example, the first and second sensors 116 and 117 may be mounted from the front side of the first table 85. Further, an elongate hole may be provided in the front of the slider 84 at a length of a maximum movement amount + α, and a single sensor may be provided on a front side of the slider 84. Furthermore, the lateral surface 85b of the first table 85 may be cut off stepwise in directions of upper and lower ends, and a convex state may be set to a movement amount + α, and be determined by a sensor provided in one place.
The third sensor 118 is mounted on a bracket 121 close to the output shaft of the powder clutch 53. To be specific, a plate 122 is mounted close to the output shaft of the powder clutch 53. One end 121a of the bracket 121 is mounted on a lower end of the plate 122. The third sensor 118 is mounted on the other end 121b of the bracket 121. Further, a rotator 132 is coaxially provided on the fourth timing pulley 69 of the output shaft of the powder clutch 53, and a detection piece 133 is provided on an outer circumference of the rotator 132. Here, the fourth timing pulley 69 of the output shaft of the powder clutch 53 is formed in the same number of teeth as the first timing pulley 58 of the refuse winding shaft 51. That is, a rotational speed of the rotator 132 (i.e., the detection piece 133) is the same as that of the refuse winding shaft 51. Since the detection piece 133 is detected by the third sensor 118, one rotation of the refuse winding shaft 51 is detected. Hereinafter, a pulse signal indicating the rotational speed of the refuse winding shaft 51 is referred to as "winding pulse."
Here, the mounting positions of the third sensor 118 and the detection piece 133 are not limited to the example of the present embodiment. Other mounting positions may be, for example, the same rotational places as the refuse winding shaft 51 on the drive-side of the frame 12. The other mounting positions may be such mounting positions that a pulse is sent from the third sensor 118 once whenever the refuse winding shaft 51 rotates once.
As shown in FIGS. 1 to 3 and 11, the third servomotor (not shown), the carrying roller 41, the nip roller 42, the guide roller 43, the turnabout roller 44, the label transferring roller 45, the re-pressed roller 46, and the re-pressing roller 47 for carrying the continuous label paper 30 are provided on the carrying path of the continuous label paper 30. The line encoder 119 is provided concomitant with the third servomotor. In FIG. 11, illustration of the label transferring blade 144, the turnabout roller 44, the label transferring roller 45, the re-pressed roller 46, and the re-pressing roller 47 are omitted.
The line encoder 119 is a rotary encoder that is coupled in the course of the carrying path of the continuous label paper 30 (particularly, to the carrying roller 41). The line encoder 119 sends a pulse signal corresponding to a carried amount of the continuous label paper 30. That is, the line encoder 119 detects the carried amount of the continuous label paper 30. Hereinafter, the pulse signal corresponding to the carried amount is referred to as "carrying pulse." Here, the carrying pulse of the line encoder 119 is detected for a winding pulse when the refuse winding shaft 51 rotates once, so that the roll diameter D of the blanked refuse roll 37 can be obtained from the carried amount of the continuous label paper 30 by calculation. Positions of the carrying roller 41, the nip roller 42, the guide roller 43, the turnabout roller 44, the label transferring roller 45, the re-pressed roller 46, the re-pressing roller 47, and the line encoder 119 are not limited to the shown positions.
The roll diameter D of the blanked refuse roll 37 is obtained by the calculator 22 on the basis of a ratio between the winding pulse and the carrying pulse. That is, the calculator 22 can obtain the roll diameter D of the blanked refuse roll 37 from the ratio of the carrying pulse of the line encoder 119 to the winding pulse sent from the third sensor 118 whenever the refuse winding shaft 51 rotates once.
Next, a method of obtaining the roll diameter D of the blanked refuse roll 37 using the calculator 22 will be described on the basis of FIG. 11. As shown in FIG. 11, when the roll diameter of the blanked refuse roll 37 is defined as D, and a feed amount of the continuous label paper 30 (i.e., a circumference of the wound blanked refuse 36) when the refuse winding shaft 51 rotates once is defined as L, $D = L/ π$
Meanwhile, a first carrying roller 41 having a roll diameter d and the line encoder 119 are provided on the carrying path of the continuous label paper 30.
The number of carrying pulses sent by the line encoder 119 with regard to one rotation of the first carrying roller 41 is defined as n. When the continuous label paper 30 is carried by a distance πd, n pulses of the carrying pulses are sent from the line encoder 119. Accordingly, a feed amount of the continuous label paper 30 per carrying pulse sent by the line encoder 119 becomes πd/n.
Here, when the number of sent pulses of the carrying pulses of the line encoder 119 when the refuse winding shaft 51 rotates once is defined as n₀, $L = π {dn}_{0} / n$
When Formula (2) is substituted into Formula (1), then the result is obtained as follows. $D = {dn}_{0} / n$
The roll diameter d and the number n of the carrying pulses of the line encoder 119 are known values. Thus, the roll diameter D of the blanked refuse roll 37 can be obtained from the number n₀ of carrying pulses sent by the line encoder 119.
Next, an example in which the refuse winding shaft 51 is raised by the control unit 24 will be described on the basis of FIGS. 4, 12 and 13. As shown in FIG. 4, the released blanked refuse 36 is put in an empty hole state where each label 34 is blanked. For this reason, when a tension applied to the blanked refuse 36 varies during refuse winding around the refuse winding shaft 51, the blanked refuse 36 is in a state where it readily breaks. Here, the label 34 is not limited to only a simple outline shape such as a single quadrilateral shape or a circular shape. Especially, as shown in FIG. 4, in a case of an irregular shape in which a prescribed shape of the label 34 has a complicated outline, when a tension of the blanked refuse 36 varies, the blanked refuse 36 is put in a state where it readily breaks. To facilitate understanding of a constitution, the outline shape of the label 34 shown in FIG. 4 will be described as a shape in which lengths are not uniform in the width direction and the carrying direction of the continuous label paper 30 by way of example.
For example, in a case where a refuse path is long, the blanked refuse 36 of the labels 34 readily breaks at a portion at which an amount of contraction of the blanked refuse 36 in the width direction increases and on which a load concentrates or a portion where the roll diameter of the blanked refuse roll 37 is made larger and the tension applied to the blanked refuse 36 is made higher. Here, the refuse path refers to a section until the blanked refuse 36 is released from the backing paper 31 by the releasing roller 147 and then reaches the refuse winding shaft 51, and device that the blanked refuse 36 is carried from the releasing roller 147 to the refuse winding shaft 51 in this section with no support.
On the other hand, it is considered that the outer circumferential surface 36a of the blanked refuse roll 37 is held in a state where it is in contact with the outer circumferential surface 142a of the refuse pressing roller 142 under pressure. In this state, it is considered that, due to winding irregularities such as an uneven shape of the outer circumferential surface 36a of the blanked refuse roll 37, a difference in roll diameter D occurs at any portion of the outer circumferential surface 36a of the blanked refuse roll 37. Further, it is considered that the blanked refuse 36 causes deformation such as ruffling, twisting, etc. on the refuse path, and thereby the blanked refuse roll 37 is wound eccentrically with respect to the paper tube 64 or vibration occurs. For this reason, the tension applied to the blanked refuse 36 may vary, and the blanked refuse 36 may be cut.
It is preferable from the above that the position of the refuse winding shaft 51 is located at a position at which the refuse path, that is, the section where the blanked refuse 36 is not supported always has a short distance and at which no winding irregularities occurs. Therefore, in the blanked refuse winding apparatus 10 of the present embodiment, the position of the refuse winding shaft 51 can be determined to a position that is an interval (a distance) r (see FIGS. 8, 10, 11 and 12) in a state where the outer circumferential surface 36a of the blanked refuse roll 37 is not eaten away in contact with the outer circumferential surface 147a of the releasing roller 147 and the refuse pressing roller 142 comes into contact with the outer circumferential surface 36a of the blanked refuse roll 37. Further, the position of the refuse winding shaft 51 is determined such that the outer circumferential surface 36a of the blanked refuse roll 37 comes into contact with the outer circumferential surface 142a of the refuse pressing roller 142 under pressure.
Here, a tension is applied to the blanked refuse 36, and thus the blanked refuse 36 undergoes contraction in the width direction. For example, as shown in FIG. 4, in a case where the blanked refuse 36 is blanked in an irregular shape, carrying-direction strip portions 361 that are portions continuing in the carrying direction and width-direction strip portions 362 that are portions continuing in the width direction are formed at the blanked refuse 36. The carrying-direction strip portions 361 of the blanked refuse 36 are wound around the refuse winding shaft 51 by a tension in a state where they expand in the carrying direction and contract in the width direction. In this case, the width-direction strip portions 362 of the blanked refuse 36 which are shaped of a lattice are put in a state where no tension acts thereon and they slacken and float with respect to the carrying-direction strip portions 361, and may be wound around the refuse winding shaft 51 in a state where they are curved in a thickness direction of the blanked refuse 36.
For this reason, a roll diameter D of the width-direction strip portions 362 of the blanked refuse roll 37 (see FIG. 11) is larger than a roll diameter D of the carrying-direction strip portions 361. Therefore, the refuse pressing roller 142 (see FIG. 4) is provided such that the roll diameter D of the width-direction strip portions 362 of the blanked refuse roll 37 is the same as the roll diameter D of the carrying-direction strip portions 361 of the blanked refuse roll 37. Simultaneously, to eliminate the refuse path, that is, the section where the blanked refuse 36 is not supported, the blanked refuse 36 is supported by the plurality of guide belts (round belts) 145 that extend in the carrying direction in a section from the releasing roller 147 to the outer circumferential surface 36a of the blanked refuse roll 37.
When winding is performed, the blanked refuse 36 separated from the continuous label paper 30 on a downstream side of the releasing roller 147 is wrapped around the releasing roller 147 by approximately a half circumference of the releasing roller 147, and is then carried to the refuse winding shaft 51 above the releasing roller 147. The carrying guide conveyor is constituted of the plurality of guide belts (round belts) 145 that are spaced apart in the width direction and are stretched in the carrying direction on the carrying path from the releasing roller 147 to the outer circumferential surface 36a of the blanked refuse roll 37. The blanked refuse 36 is spread and guided on the carrying guide conveyor. This carrying path can be regarded that it is not the refuse path because the blanked refuse 36 is guided and supported. Therefore, the blanked refuse 36 makes stable refuse raising possible without causing twisting, inversion, and so on.
In the carrying guide conveyor, lengths of the guide belts (the round belts) 145 in the carrying direction, that is, distances of the guide belts (the round belts) 145 in the carrying direction of the carrying path are set to be more than or equal to a minimum span LC (see FIG. 12) required to maintain the blanked refuse 36 in a straight shape at an initial position at which refuse raising is performed on an outer circumferential surface 64a of the paper tube 64 shown in (A) of FIG. 12. The span LC is set to 74 mm by way of example. The lengths of the guide belts (the round belts) 145 are regulated by a length of the swing part 150, that is, a center distance LD between the releasing roller 147 and the refuse pressing roller 142.
As shown in FIGS. 3 to 5, the refuse pressing roller 142 located on a downstream side of the carrying guide conveyor can be swiveled around the axis of the releasing roller 147 upstream of the carrying guide conveyor using the center distance LD (see FIG. 3) as a radius of rotation. Further, the refuse pressing roller 142 is pressed toward the outer circumferential surface 36a of the blanked refuse roll 37 by the refuse pressing air cylinder 153. Thus, even if the roll diameter D of the blanked refuse roll 37 increases, the outer circumferential surface 142a of the refuse pressing roller 142 always comes into contact with the outer circumferential surface 36a of the blanked refuse roll 37 at a fixed pressure, so that the outer circumferential surface 142a of the refuse pressing roller 142 is made to rotate at the same circumferential speed as a winding speed of the blanked refuse roll 37.
The guide belts (the round belts) 145 are wrapped between the refuse pressing roller 142 and the releasing roller 147, and the refuse pressing roller 142 rotated by the contact with the blanked refuse roll 37 and the releasing roller 147 rotate at the same speed. Therefore, a winding speed of the outer circumferential surface 36a of the blanked refuse roll 37, a circumferential speed of the outer circumferential surface 142a of the refuse pressing roller 142, and a circumferential speed of the outer circumferential surface 147a of the releasing roller 147 are all coincident with one another. Thus, the blanked refuse 36 up to the outer circumferential surface 36a of the blanked refuse roll 37 after being separated by the releasing roller 147 supports both the releasing roller 147 and the refuse pressing roller 142 at the same speed as the winding speed of the blanked refuse roll 37.
The guide belts (the round belts) 145 are wound around the outer circumferential surface 147a of the releasing roller 147 so as not to protrude from the guide grooves 147f. Thus, the blanked refuse 36 is guided in uniform contact with the outer circumferential surface 147a of the releasing roller 147. After the blanked refuse 36 is brought into contact with the outer circumferential surface 147a of the releasing roller 147 and is subjected to refuse raising, the blanked refuse 36 is guided along the guide belts (the round belts) 145 while being supported by the guide belts (the round belts) 145. In proportion as the guide belts 145 sink in the guide grooves 147f, the guide belts 145 are rotated slower than the winding speed of the blanked refuse roll 37, and guide the blanked refuse 36.
Likewise, the guide belts (the round belts) 145 are wound around the outer circumferential surface 142a of the refuse pressing roller 142 so as not to protrude from the guide grooves 142f. Thus, the blanked refuse 36 is guided in uniform contact with the outer circumferential surface 142a of the refuse pressing roller 142. The blanked refuse 36 guided along the guide belts (the round belts) 145 is being smoothly wound along the outer circumferential surface 36a of the blanked refuse roll (the paper tube) 37 at a contact position between the refuse pressing roller 142 and the outer circumferential surface 36a of the blanked refuse roll 37. The guide belts (the round belts) 145 guide the blanked refuse 36 to come into contact with the outer circumferential surface 36a of the blanked refuse roll 37 in a section of an ingress nip N of a guide belt ingress on the outer circumferential surface 142a of the refuse pressing roller 142 shown in FIGS. 1 and 2.
Further, the guide belts (the round belts) 145 are formed of a material having elasticity. For this reason, the guide belts (the round belts) 145 are rapidly sent in the section of the ingress nip N on the outer circumferential surface 142a of the refuse pressing roller 142 at the winding speed of the refuse roll 37, and return to an original slow circumferential speed in the vicinity of a most downstream side of N from which the nip is removed, and the guide belts (the round belts) 145 sent in the N section in surplus go up. Accordingly, downstream sides from portions of the guide belts (the round belts) 145, which are portions spaced apart from the outer circumferential surface 36a of the blanked refuse roll 37 on the outer circumferential surface 142a of the refuse pressing roller 142, bounce out of the guide grooves 142f, as shown in FIG. 4. In other words, in FIG. 1, the refuse pressing roller 142 is rotated at the same speed as the blanked refuse roll 37, whereas the guide belts 145 are rotated slower than the winding speed of the blanked refuse roll 37 in proportion as they sink in the guide grooves. In this case, since the guide belts are rapidly sent at the same speed as the blanked refuse roll 37 in the section of the ingress nip N of the refuse pressing roller 142, the guide belts go up in the vicinity of a most downstream side of N from which the nip is removed. Thus, as shown in FIG. 4, the guide belts 145 bounce out of the guide grooves 142f. Thus, even in a portion where the outer circumferential surface 36a of the blanked refuse roll 37 is recessed relative to the outer circumferential surface 142a of the refuse pressing roller 142 having a cylindrical shape, the blanked refuse 36 can be pressed toward the outer circumferential surface 36a of the blanked refuse roll 37. Therefore, the blanked refuse 36 can also be stably wound around and adhered to the outer circumferential surface 36a of the blanked refuse roll 37 which has irregularities.
The blanked refuse 36, which are guided and stably carried to the guide belts (the round belts) 145 in this way, is wound around the refuse winding shaft 51 while inhibiting the outer circumferential surface 36a of the blanked refuse roll 37 from having an uneven shape.
As shown in FIG. 12, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 is usually set to about 30 mm. However, depending on setting of the span LC, or diameters and positions of the blanked refuse roll 37, the releasing roller 147, and the refuse pressing roller 142, the interval r can also be set within a range of 20 to 50 mm by changing the setting of the interval r. An initial position of the refuse winding shaft 51 is a position shown in (A) of FIG. 12. The initial position of the refuse winding shaft 51 is a position of the refuse winding shaft 51 in a state where the blanked refuse 36 for the labels 34 are not wound around the paper tube 64 fixed to the refuse winding shaft 51.
Returning to FIG. 4, the interval r (see FIGS. 8, 10, 11 and 12) is set such that the outer circumferential surface 64a of the paper tube 64 fixed to the refuse winding shaft 51 is not eaten away in contact with the outer circumferential surface 147a of the releasing roller 147 and the refuse pressing roller 142 comes into contact with the outer circumferential surface 36a of the blanked refuse roll 37. Accordingly, when the blanked refuse 36 is released from the backing paper 31 by the releasing roller 147, it is guided to the guide belts (the round belts) 145 and is wound around the paper tube 64 fixed to the refuse winding shaft 51. The wound blanked refuse 36 is integrated with the refuse winding shaft 51 (i.e., the paper tube 64) by an adhesive face of the blanked refuse 36. Thus, there is no refuse path on which only the blanked refuse 36 is carried, and the blanked refuse 36 is wound without being cut.
Here, a method of winding the blanked refuse of the continuous label paper with no refuse path on which only the blanked refuse 36 is carried will be described on the basis of FIG. 12. In FIG. 12, illustration of the refuse pressing roller 142 is omitted. As shown in FIGS. 3 and (A) of FIG.12, first, a shaft position P of the refuse winding shaft 51 is set as a state where the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 147a are spaced apart from each other such that they are not eaten away in contact with each other. To be specific, when a diameter of the refuse pressing roller 142 and a diameter of the releasing roller 147 are each set to φ 60 mm, the span LC is set to 74 mm, and winding is performed using the blanked refuse roll 37 having a diameter of φ 100 mm to φ 600 mm, the interval r is usually set to about 30 mm. The shaft position P indicates a distance between the outer circumferential surface 147a of the releasing roller 147 and the center 51a of the refuse winding shaft 51.
As shown in FIGS. 3 and 12B, when carrying of the continuous label paper 30 is initiated, the refuse winding shaft 51 is rotated in a refuse winding process. As the refuse winding shaft 51 rotates, the blanked refuse 36 released from the backing paper 31 (see FIG. 4) is wound around the paper tube 64 of the refuse winding shaft 51. In a roll diameter calculating process, the roll diameter D of the blanked refuse roll 37 is obtained on the basis of the winding pulse signal for the third sensor 118 (see FIG. 1) or the carrying pulse signal from the line encoder 119. The third sensor 118 detects one rotation of the refuse winding shaft 51. The line encoder 119 detects a carried amount of the continuous label paper 30. Next, the calculated roll diameter D is stored in the calculator 22 inside the controller 21. A roll diameter obtained by adding an arbitrarily set increment in dimension in a radial direction to the roll diameter D stored in the calculator 22 is set as "raising start roll diameter D1" of the blanked refuse roll 37 in advance.
As shown in FIGS. 3 and 12C, the roll diameter D of the blanked refuse roll 37 is obtained by every calculation from an amount of the carrying pulse of the line encoder 119 which is segmented whenever the refuse winding shaft 51 rotates once in the process of carrying the continuous label paper 30. In a refuse winding shaft moving process, the obtained roll diameter D of the blanked refuse roll 37 is compared with the "raising start roll diameter D1." In a case where the compared roll diameter D is larger than the "raising start roll diameter D1," the second servomotor 82 of the up-down moving mechanism 16 (see FIG. 1) is driven on the basis of a signal from the control unit 24. The sixth timing pulley 95 is rotated by the second servomotor 82, and thus the rotation of the sixth timing pulley is transmitted to the fifth timing pulley 93 of the rotary shaft 89 via the third timing belt 96. The fifth timing pulley 93 is rotated, and thus the pair of driving gears 79 are rotated by way of the rotary shaft 89.
The pair of driving gears 79 are rotated, and thus the pair of driven gears 78 are rotated. The pair of driven gears 78 are rotated, and thus the pair of ball screws 77 are rotated. The pair of ball screws 77 are rotated, and thus the coupling brackets 92 (i.e., the movable body 76) are moved in the up-down direction. The winding mechanism 14 is mounted on the first and second tables 85 and 86 of the movable body 76. The movable body 76 is moved in the up-down direction, and thus the refuse winding shaft 51 is raised up to the shaft position P by a refuse-winding-shaft raising setting value of the refuse winding shaft 51 which is arbitrarily set. That is, the refuse winding shaft 51 is moved in a direction away from the releasing roller 147. Thus, as shown in (C) of FIG. 12, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 becomes such a distance that the outer circumferential surface 36a of the blanked refuse roll 37 does not come into contact with the outer circumferential surface 147a of the releasing roller 147.
After the raising operation of the refuse winding shaft 51 is completed, the roll diameter D of the blanked refuse roll 37 is calculated again by the same method. The roll diameter D is overwritten in the calculator 22, and thus a new "raising start roll diameter D1" of the refuse winding shaft 51 is determined. Hereinafter, similarly, the refuse winding shaft 51 is raised on the basis of a signal from the control unit 24.
That is, the control unit 24 controls the up-down moving mechanism 16 on the basis of the roll diameter D obtained by the calculator 22 to cause the refuse winding shaft 51 to move in a direction away from the releasing roller 147 or toward the releasing roller 147. Next, an example in which the refuse winding shaft 51 is moved in the direction away from the releasing roller 147 by the control unit 24 will be described in detail on the basis of FIGS. 12 and 13.
FIG. 12 is a front view showing a positional relationship between the refuse winding shaft 51, the blanked refuse roll 37, and the releasing roller 147 at points in time of RA, RB, RC of FIG. 13. FIG. 13 is a graph showing an example of raising timing for the refuse winding shaft 51 when the winding operation of the blanked refuse is performed. In FIG. 12, the interval r indicates a distance between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 or a distance between the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 147a of the releasing roller 147. As described above, the shaft position P indicates a distance between the outer circumferential surface 147a of the releasing roller 147 and the center 51a of the refuse winding shaft 51.
As shown in FIGS. 12A and 13, at the point in time of the rotational speed RA of the refuse winding shaft 51, a tube diameter of the paper tube 64 is formed to be smaller than the raising start roll diameter D1. For example, the paper tube 64 is set to 100 mm in tube diameter. Accordingly, the interval r is held between the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 147a of the releasing roller 147. Thus, the blanked refuse 36 is wound around the paper tube 64 of the refuse winding shaft 51 in a state where the refuse winding shaft 51 is not raised.
As shown in FIGS. 12B and 13, the blanked refuse 36 is wound around the paper tube 64 of the refuse winding shaft 51, and thus the roll diameter D of the blanked refuse roll 37 is increased. Simultaneously, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 is reduced. The roll diameter D of the blanked refuse roll 37 exceeds the "raising start roll diameter D1" in a state where the refuse winding shaft 51 reaches the rotational speed RB.
The refuse winding shaft 51 initiates raising. During the raising of the refuse winding shaft 51, the blanked refuse 36 is continuously wound around the refuse winding shaft 51. The blanked refuse 36 is continuously wound around the paper tube 64 of the refuse winding shaft 51, and thus the roll diameter D of the blanked refuse roll 37 is increased. In this state, the refuse winding shaft 51 is raised. Accordingly, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 is increasing toward a preset refuse-winding-shaft raising setting value.
As shown in FIGS. 12C and 13, at the point in time of the rotational speed RC of the refuse winding shaft 51, a raising value of the refuse winding shaft 51 reaches a present refuse-winding-shaft raising setting value (e.g., 5.0 mm). Accordingly, the refuse winding shaft 51 stops raising. A roll diameter obtained by adding an arbitrarily set increment (e.g., 3.0 mm) in dimension in a radial direction to the roll diameter D when the refuse winding shaft 51 stops raising is determined as a new raising start roll diameter D1. The blanked refuse 36 is wound without raising the refuse winding shaft 51 until the roll diameter D reaches the raising start roll diameter D1.
As described above, the operations of RA to RC are repeated in turn, and thereby the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 is usually set to be in a range of 20 mm ≤ r ≤ 50 mm. Accordingly, the outer circumferential surface 36a of the blanked refuse roll 37 can maintain such a distance or more that it does not come into contact with the outer circumferential surface 147a of the releasing roller 147. Thus, a stable winding shape of the blanked refuse 36 can be maintained without the blanked refuse 36 being cut.
In this way, the refuse winding shaft 51 can be moved in a direction away from the releasing roller 147 or toward the releasing roller 147 on the basis of the roll diameter D of the blanked refuse roll 37. Accordingly, the interval r between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 can be maintained in a state where they are not in contact with each other. Simultaneously, the blanked refuse 36 released from the backing paper 31 by the releasing roller 147 is wound in a state where it is guided to the guide belts (the round belts) 145, and thereby a dimension of the refuse path from the outer circumferential surface 147a of the releasing roller 147 to the outer circumferential surface 36a of the blanked refuse roll 37 can be restrained.
Thus, even in a case where a prescribed shape of each label 34 is a shape other than a rectangular shape or a circular shape, and has an irregular shape in which longitudinal and transverse tensions in the blanked refuse 36 are made uneven, the tensions occurring in the blanked refuse 36 that is being wound are stabilized, and thus breaking of the blanked refuse 36 can be prevented to the maximum extent. Further, the carrying path from the outer circumferential surface 147a of the releasing roller 147 to the outer circumferential surface 36a of the blanked refuse roll 37 is guided by the guide belts (the round belts) 145 to eliminate the dimension of the refuse path, and thus the breaking of the blanked refuse 36 can be prevented even if a strong tension is applied to the blanked refuse 36 compared to the related art.
Further, the blanked refuse 36 is wound while the outer circumferential surface 36a of the blanked refuse roll 37 is pressed down by the refuse pressing roller 142, and simultaneously the blanked refuse 36 is wound while being pushed toward the outer circumferential surface 36a of the blanked refuse roll 37 on which irregularities are caused by the guide belts (the round belts) 145. Thereby, the blanked refuse 36 is stably wound, so that the breaking of the blanked refuse 36 can be prevented to the maximum extent. Furthermore, the breaking of the blanked refuse 36 is prevented, and thus a printing speed of the continuous label paper 30 can be increased. As a result, productivity of the labels 34 can be remarkably improved.
In the present embodiment, the increment in dimension in the radial direction is set to 3.0 mm, and the refuse-winding-shaft raising setting value is set to 5.0 mm. However, the increment in dimension in the radial direction and the refuse-winding-shaft raising setting value are not limited to 3.0 mm and 5.0 mm. That is, any control will do under which the refuse winding shaft 51 is raised such that the interval r between the outer circumferential surface 64a of the paper tube 64 fixed to the refuse winding shaft 51 by the lugs 62 and the outer circumferential surface 147a of the releasing roller 147 or between the outer circumferential surface 36a of the blanked refuse roll 37 and the outer circumferential surface 147a of the releasing roller 147 holds a constant range. Other examples include an example in which a thickness dimension of the continuous label paper 30 may be measured before winding is initiated and the refuse-winding-shaft raising setting value may be changed depending to the measured value. Further, another example may be configured such that a value can be changed by a type or a winding speed of the continuous label paper 30.
Further, the up-down moving mechanism 16 of the refuse winding shaft 51, for example, also enables the refuse winding shaft 51 to manually move up and down during the stop of an winding operation, in addition to the automatic operation in operation as described in the present embodiment. The manual operation of the refuse winding shaft 51 is used, for example, in a case where the blanked refuse roll is demounted from the refuse winding shaft 51, for example, when the blanked refuse roll 37 reaches a maximum roll diameter.
While the preferred embodiment of the present invention has been described with reference to the drawings, the present invention is not limited to the above embodiment. All the shapes and combinations of the components shown in the aforementioned embodiment are only examples, and can be variously modified based on design requirements without departing from the spirit and scope of the present invention.
For example, in the above embodiment, the movable body 76 is moved in the up-down direction by the pair of linear motion guides 75 and the pair of ball screws 77, but a method for moving the movable body 76 is not limited to the above embodiment. Other examples include an example in which, in place of the pair of ball screws 77, trapezoidal threads or the like may be used. In addition, the number of ball screws 77 or trapezoidal threads is also preferably provided in a pair in view of positional precision or durability, but it may be one.
Further, in the above embodiment, the example in which the powder clutch 53 is given as an example of the tension regulator and the change of the tension applied to the blanked refuse 36 of the blanked refuse roll 37 is constantly held by the powder clutch 53 has been described, but the present invention is not limited thereto. As another tension regulator, another clutch having a function of smoothly sliding and changing a setting torque step by step may be adopted.
In addition, in the above embodiment, the rotary encoder has been described as an example of the line encoder 119 of the first detector for detecting the carried amount of the continuous label paper 30, but the present invention is not limited thereto.
Further, in the above embodiment, the example in which the refuse winding shaft 51 is moved by the control unit 24 on the basis of the roll diameter D obtained by the calculator 22 has been described, but the present invention is not limited thereto. Other examples include an example in which the refuse winding shaft 51 may be manually moved on the basis of the roll diameter D obtained by the calculator 22.
In addition, in the above embodiment, the releasing roller 147 is given as an example of the releasing roller, but the present invention is not limited thereto. Other examples include an example in which the releasing roller may be used as a movable releasing roller.
Further, in the above embodiment, the example in which the refuse winding shaft 51 is provided above the roller center 147b of the releasing roller 147 in the vertical direction, but the present invention is not limited thereto. Other examples include an example in which the refuse winding shaft 51 may be provided in another direction such as an oblique upper side of the releasing roller 147, a side horizontally parallel to the releasing roller 147, or the like.
The above embodiment has the constitution in which the label transferring mechanism is constituted of the releasing roller 147, the label transferring blade 144, the turnabout roller 44, and the label transferring roller 45 and each label 34 adheres to the backing paper 31 again after the refuse raising. However, the present invention may have a constitution in which the refuse raising is performed without proving the label transferring mechanism and releasing each label 34 from the backing paper 31. This example may be adopted as a constitution in which illustration of the constitution shown in FIG. 11 is omitted.
While preferred embodiments of the present disclosure have been described in detail, the present disclosure is not limited to a specific embodiment, and can be modified and changed in various ways without departing from the scope of the present invention defined by the claims.

Claims

A blanked refuse winding apparatus (10) for continuous label paper (30) which has a releasing roller (147) that is configured to carry continuous label paper (30) subjected to a half-blanking process and separate into blanked products (34) and blanked refuse (36) that adhere to backing paper (31), the blanked refuse winding apparatus (10) for continuous label paper (30) comprising:
a refuse winding shaft (51) provided away from the releasing roller (147) and configured to wind the blanked refuse (36) into a roll shape;

a moving mechanism (16) configured to enable the refuse winding shaft (51) to move in a direction away from the releasing roller (147);

a first detector (119) provided in the course of a carrying path of the continuous label paper (30) and configured to detect a carried amount of the continuous label paper;

a second detector (118) configured to detect one rotation of the refuse winding shaft (51); and

a calculator (22) configured to obtain a roll diameter of the blanked refuse (36), which is wound around the refuse winding shaft (51), from a ratio of a pulse of the first detector (119) to a pulse sent from the second detector (118) whenever the refuse winding shaft (51) rotates once,

wherein the blanked refuse winding apparatus (10) for continuous label paper (30) is configured to perform control of moving the refuse winding shaft (51) in the direction away from the releasing roller (147) on the basis of the roll diameter obtained by the calculator (22), and includes:
a refuse pressing roller (142) configured to be able to come into contact with an outer circumferential surface (36a) of the blanked refuse (36) wound around the refuse winding shaft (51) in response to a change in the roll diameter; and

an endless guide belt (145) wound around the releasing roller (147) and the refuse pressing roller (147) and configured to guide the blanked refuse (36) from the releasing roller (147) to a roll of the blanked refuse (36) wound around the refuse winding shaft (51).
The blanked refuse winding apparatus (10) for continuous label paper according to claim 1, wherein the refuse pressing roller (142) is provided to be swingable about an axis of the releasing roller (142), and a refuse pressing carrying unit (200) configured to press the refuse pressing roller (142) toward the outer circumferential surface (36a) of the blanked refuse (36) wound around the refuse winding shaft (51) is provided.
The blanked refuse winding apparatus for continuous label paper (30) according to claim 1 or 2, wherein guide grooves (142f, 147f) are provided in the releasing roller (147) and the refuse pressing roller (142), and the guide belts (145) separated in axial directions of the releasing roller (147) and the refuse pressing roller (142) are wound around the guide grooves (142f, 147f).
The blanked refuse winding apparatus for continuous label paper according to any one of claims 1 to 3, further comprising a tension regulator (53) provided on a drive side of the refuse winding shaft (51) and configured to adjust a tension applied to the blanked refuse (36).
The blanked refuse winding apparatus for continuous label paper (30) according to any one of claims 1 to 4, further comprising a releasing roller positioning unit (220) configured to adjust a position of an axial center of the releasing roller in a direction orthogonal to a direction in which the axial center of the releasing roller (147) and a line of an axial center of the refuse winding shaft (51) are connected.